CyberSecBulletin

Sensitive Cookie with Improper SameSite Attribute

CWE-1275

The SameSite attribute for sensitive cookies is not set, or an insecure value is used.

We track 20 vulnerabilities of this type. 100% are rated high or critical, and the average CVSS score is 8.5.

How this weakness is prevented

  • Implementation: Set the SameSite attribute of a sensitive cookie to Lax or Strict. This instructs the browser to apply this cookie only to same-domain requests, which provides a good Defense in Depth against CSRF attacks. When the Lax value is in use, cookies are also sent for top-level cross-domain navigation via HTTP GET, HEAD, OPTIONS, and TRACE methods, but not for other HTTP methods that are more likely to cause side-effects of state mutation.

Latest Sensitive Cookie with Improper SameSite Attribute vulnerabilities

  • 7.1 High severity

    hatchet: Improper Authentication

    CVE-2026-61687Hatchet-dev

    Hatchet is a platform for orchestrating background tasks, AI agents, and durable workflows at scale. Prior to 0.91.1, ValidateOAuthState clears the oauth_state_ session value to an empty string after a successful OAuth callback and later accepts an empty state

  • 7.4 High severity

    OpenAM: Sensitive Cookie Without 'HttpOnly' Flag

    CVE-2026-53660OpenIdentityPlatform

    Open Access Management (OpenAM) is an access management solution. Prior to 16.1.1, the default configuration initializes the iPlanetDirectoryPro SSO cookie with HttpOnly disabled and without a protective SameSite default, and OAuth and OpenID Connect consent f

  • 7.5 High severity

    Spring Framework: Sensitive Cookie with Improper SameSite Attribute

    CVE-2026-47889Spring

    A WebFlux application running on the Jetty 12 Core reactive adapter serializes response cookies without the sameSite attribute. Spring Framework 7.0.0 - 7.0.8 Spring Framework 6.2.0 - 6.2.19

  • 8.8 High severity

    Concrete CMS: Cross-Site Request Forgery

    CVE-2026-8434Concrete CMS

    Concrete CMS 9 before 9.5.0 is vulnerable to Cross Site Request Forgery (CSRF) at concrete/controllers/backend/file rescanMultiple(). The Concrete CMS security team gave this vulnerability a CVSS v.4.0 score of 2.3 with vector CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P

  • 8.8 High severity

    Concrete CMS: Cross-Site Request Forgery

    CVE-2026-8433Concrete CMS

    Concrete CMS 9 before 9.5.0 is vulnerable to Cross Site Request Forgery (CSRF) at concrete/controllers/backend/file rescan(). The Concrete CMS security team gave this vulnerability a CVSS v.4.0 score of 2.3 with vector CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI

  • 8.8 High severity

    Concrete CMS: Cross-Site Request Forgery

    CVE-2026-8432Concrete CMS

    Concrete CMS 9 before 9.5.0 is vulnerable to Cross Site Request Forgery (CSRF) at concrete/controllers/backend/file star(). The Concrete CMS security team gave this vulnerability a CVSS v.4.0 score of 2.3 with vector CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:L

  • 8.8 High severity

    Concrete CMS: Cross-Site Request Forgery

    CVE-2026-8427Concrete CMS

    Concrete CMS 9 before 9.5.0 is vulnerable to Cross Site Request Forgery (CSRF) at concrete/controllers/backend/file removeFavoriteFolder($id). The Concrete CMS security team gave this vulnerability a CVSS v.4.0 score of 2.3 with vector CVSS:4.0/AV:N/AC:L/AT:P/

  • 8.8 High severity

    Concrete CMS: Cross-Site Request Forgery

    CVE-2026-8416Concrete CMS

    Concrete CMS 9 before 9.5.0 is vulnerable to Cross Site Request Forgery (CSRF) at concrete/controllers/backend/file addFavoriteFolder($id). The Concrete CMS security team gave this vulnerability a CVSS v.4.0 score of 2.3 with vector CVSS:4.0/AV:N/AC:L/AT:P/PR:

  • 8.8 High severity

    Concrete CMS: Cross-Site Request Forgery

    CVE-2026-8415Concrete CMS

    Concrete CMS 9 before 9.5.0 is vulnerable to Cross Site Request Forgery (CSRF) at concrete/controllers/dialog/express/association/reorder. The Concrete CMS security team gave this vulnerability a CVSS v.4.0 score of 2.3 with vector CVSS:4.0/AV:N/AC:L/AT:P/PR:N

  • 8.8 High severity

    Concrete CMS: Cross-Site Request Forgery

    CVE-2026-8414Concrete CMS

    Concrete CMS 9 before 9.5.0 is vulnerable to Cross Site Request Forgery (CSRF) at concrete/controllers/dialog/event/duplicate. The Concrete CMS security team gave this vulnerability a CVSS v.4.0 score of 2.3 with vector CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/V

  • 8.8 High severity

    Concrete CMS: Cross-Site Request Forgery

    CVE-2026-8413Concrete CMS

    Concrete CMS 9 before 9.5.0 is vulnerable to Cross Site Request Forgery (CSRF) at concrete/controllers/dialog/page/bulk/design. The Concrete CMS security team gave this vulnerability a CVSS v.4.0 score of 2.3 with vector CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/

  • 8.8 High severity

    Concrete CMS: Cross-Site Request Forgery

    CVE-2026-8412Concrete CMS

    Concrete CMS 9 before 9.5.0 is vulnerable to Cross Site Request Forgery (CSRF) at concrete/controllers/dialog/page/bulk/cache. The Concrete CMS security team gave this vulnerability a CVSS v.4.0 score of 2.3 with vector CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/V

  • 8.8 High severity

    Concrete CMS: Cross-Site Request Forgery

    CVE-2026-8411Concrete CMS

    Concrete CMS 9 before 9.5.0 is vulnerable to Cross Site Request Forgery (CSRF) at concrete/controllers/dialog/page/bulk/delete. The Concrete CMS security team gave this vulnerability a CVSS v.4.0 score of 2.3 with vector CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/

  • 8.8 High severity

    Concrete CMS: Cross-Site Request Forgery

    CVE-2026-8410Concrete CMS

    Concrete CMS 9 before 9.5.0 is vulnerable to Cross Site Request Forgery (CSRF) at concrete/controllers/dialog/logs/bulk/delete. The The Concrete CMS security team gave this vulnerability a CVSS v.4.0 score of 2.3 with vector CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/V

  • 8.8 High severity

    Concrete CMS: Cross-Site Request Forgery

    CVE-2026-8409Concrete CMS

    Concrete CMS 9 before 9.5.0 is vulnerable to Cross Site Request Forgery (CSRF) at concrete/controllers/dialog/logs/delete. The The Concrete CMS security team gave this vulnerability a CVSS v.4.0 score of 2.3 with vector CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/V

  • 8.8 High severity

    AION: Sensitive Cookie with Improper SameSite Attribute

    CVE-2025-52628HCL

    HCL AION is affected by a Cookie with Insecure, Improper, or Missing SameSite vulnerability. This can allow cookies to be sent in cross-site requests, potentially increasing exposure to cross-site request forgery and related security risks. This issue affects

  • 8.8 High severity

    Kimai: Sensitive Cookie with Improper SameSite Attribute

    CVE-2023-53957Kimai

    Kimai 1.30.10 contains a SameSite cookie vulnerability that allows attackers to steal user session cookies through malicious exploitation. Attackers can trick victims into executing a crafted PHP script that captures and writes session cookie information to a

  • 7.5 High severity

    Sterling B2B Integrator: Sensitive Cookie with Improper SameSite Attribute

    CVE-2025-36134IBM

    IBM Sterling B2B Integrator and IBM Sterling File Gateway 6.0.0.0 through 6.1.2.7 and 6.2.0.0 through 6.2.0.5 and 6.2.1.1 could disclose sensitive information due to a missing or insecure SameSite attribute for a sensitive cookie.

  • 8.2 High severity

    misskey: Cross-Site Request Forgery

    CVE-2025-24897Misskey-dev

    Misskey is an open source, federated social media platform. Starting in version 12.109.0 and prior to version 2025.2.0-alpha.0, due to a lack of CSRF protection and the lack of proper security attributes in the authentication cookies of Bull's dashboard, some

  • 9.8 Critical severity

    Firefox: Sensitive Cookie with Improper SameSite Attribute

    CVE-2024-6611Mozilla

    A nested iframe, triggering a cross-site navigation, could send SameSite=Strict or Lax cookies. This vulnerability affects Firefox < 128 and Thunderbird < 128.